body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  max-width: 800px;
  margin: 0 auto;
  padding: 20px;
  background-color: #f5f7ff;
  color: #333;
}
.container {
  background: white;
  border-radius: 10px;
  padding: 30px;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}
h1 {
  color: #2c3e50;
  border-bottom: 2px solid #3498db;
  padding-bottom: 10px;
}
.card {
  background: #f8f9fa;
  border-left: 4px solid #3498db;
  padding: 15px;
  margin: 20px 0;
  border-radius: 0 5px 5px 0;
}
.card h3 {
  margin-top: 0;
  color: #2c3e50;
}
.status-bar {
  display: flex;
  justify-content: space-between;
  background: #e3f2fd;
  padding: 10px;
  border-radius: 5px;
  margin: 20px 0;
  font-weight: bold;
}
.online-status {
  color: #27ae60;
}
.offline-status {
  color: #e74c3c;
}
button {
  background: #3498db;
  color: white;
  border: none;
  padding: 10px 15px;
  border-radius: 5px;
  cursor: pointer;
  font-size: 16px;
  margin: 5px;
  transition: background 0.3s;
}
button:hover {
  background: #2980b9;
}
.api-test {
  display: flex;
  gap: 10px;
  margin: 15px 0;
}
.log-container {
  background: #2c3e50;
  color: #ecf0f1;
  padding: 15px;
  border-radius: 5px;
  height: 150px;
  overflow-y: auto;
  font-family: monospace;
  font-size: 14px;
}
.log-entry {
  margin: 5px 0;
  padding: 3px;
  border-bottom: 1px solid #34495e;
}
.log-time {
  color: #3498db;
}
.cache-list {
  margin-top: 10px;
  padding: 10px;
  background: #34495e;
  border-radius: 5px;
  color: #ecf0f1;
}
.hidden {
  display: none;
}
.controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 20px 0;
}